/*
 * Copyright 2010-2011 CGT&DC ISA RAS
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package websolve.workflow.util;

import java.io.IOException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class NetworkUtils {

    public static InetAddress getLocalAddress() throws IOException {
        InetAddress localAddress = InetAddress.getLocalHost();
        final int timeout = 2000;
        if (localAddress.isLoopbackAddress() == true || localAddress.isReachable(timeout) == false) {
            Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces();
            while (ifaces.hasMoreElements()) {
                NetworkInterface iface = ifaces.nextElement();
                Enumeration<InetAddress> addresses = iface.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress address = addresses.nextElement();
                    if (address.isLoopbackAddress() == false && address.isLinkLocalAddress() == false
                            && address.isReachable(timeout) == true) {
                        localAddress = address;
                        break;
                    }
                }
            }
        }
        return localAddress;
    }

}
